For Robin: Unless you want to be a total dingus, you should definitely dress up as Robin from "Stranger Things." Her Scoops Ahoy outfit is the most notable, so we advise wearing a blue-and-white striped shirt with a navy vest and white collar on top.
For Steve: You'll need Steve's iconic Scoops Ahoy outfit, luscious brown hair, and probably a sexy stare, too. You can also add an ice cream scooper to finish off your look.